Issues with Character Controller moving Enemies

Hi Guys,

So i'm new to coding, and have been working on making a 2D Platformer.

I have a bunch of enemies that deal damage, and move using the following code I learnt from a great Youtube Channel:

 using UnityEngine;
 using System.Collections;
 
 public class EnemyMovementController : MonoBehaviour {
 
     public float enemySpeed;
 
     Animator enemyAnimator;
 
     private Transform myTransform;
     public Transform target;
 
     // facing
 
     public GameObject enemyGraphic;
     bool canFlip = true;
     bool facingRight = false;
     float flipTime = 5f;
     float nextFlipChance  = 0f;
 
     //attacking
 
     public float chargeTime;
     float startChargeTime;
     bool charging;
     Rigidbody2D enemyRB;
 
     void Awake()
     {
         myTransform = transform;
     }
 
 
     // Use this for initialization
     void Start () {
         enemyAnimator = GetComponentInChildren<Animator> ();
         enemyRB = GetComponent<Rigidbody2D> ();
 
     }
     
     // Update is called once per frame
     void Update () {
         if (Time.time > nextFlipChance) {
             if (Random.Range (0, 10) >= 5) flipFacing ();
             nextFlipChance = Time.time + flipTime;
         }
     }
 
     void OnTriggerEnter2D(Collider2D other){
         if (other.tag == "Player") {
             if (facingRight && other.transform.position.x > transform.position.x){
                 flipFacing ();
         } else if  (!facingRight && other.transform.position.x < transform.position.x){
             flipFacing ();
         }
             canFlip = false;
             charging = true;
             startChargeTime = Time.time + chargeTime;
 
         }
     }
 
     void OnTriggerStay2D(Collider2D other){
         if (other.tag == "Player") {
             if (startChargeTime < Time.time){
                 // Get a direction vector from us to the target
                 Vector3 dir = target.position - myTransform.position;
                 
                 // Normalize it so that it's a unit direction vector
                 dir.Normalize();
                 
                 // Move ourselves in that direction
                 myTransform.position += dir * enemySpeed * Time.deltaTime;
                 enemyAnimator.SetBool("isCharging", charging);
             }
         }
     }
 
     void OnTriggerExit2D(Collider2D other){
         if (other.tag == "Player") {
             canFlip = true;
             charging = false;
 
             enemyAnimator.SetBool("isCharging", charging);
         }
     }
 
     void flipFacing(){
         if (!canFlip) return;
         float facingX = enemyGraphic.transform.localScale.x;
         facingX *= -1f;
         enemyGraphic.transform.localScale = new Vector3 (facingX, enemyGraphic.transform.localScale.y, enemyGraphic.transform.localScale.z);
         facingRight = ! facingRight;
         }
 
 }

My issue Comes when the player interacts with the enemy. As the player does not have a dynamic Rigidbody attached, mass etc do not affect it, so the player can just push the enemy around whilst taking damage should they please.

Adding a dynamic Rigidbody to the player causes a variety of glitches, like the enemies shunting or trapping the player indefinitely.

Is there any way to effectively make the enemy ignore the forces being created by the player so that it cannot be moved?

Thanks in advance for your help!